Fig. 1.

Bar graphs showing mean alpha (8–12 Hz) amplitudes (calculated offline using average-reference montage) averaged across all participants for Baseline 1, Neurofeedback, and Baseline 2. This was done globally (left) across all 19 electrodes, and at the Pz feedback site (right). *Indicates significance threshold of p < 0.01, and **p < 0.005. Error bars represent 1 standard error of the mean.